CVE Feed

    Dashboard / CVE / CVE-2023-43826

    CVE-2023-43826

    Apache Guacamole 1.5.3 and older do not consistently ensure that values received from a VNC server will not result in integer overflow. If a user connects to a malicious or compromised VNC server, specially-crafted data could result in memory corruption, possibly allowing arbitrary code to be executed with the privileges of the running guacd process. Users are recommended to upgrade to version 1.5.4, which fixes this issue.

    Published:Dec 19, 2023
    Last Modified:Feb 25, 2026
    EPS:Dec 19, 2023
    EPSS Score:0.00084
    CVSS Score:0

    Affected Products

    Vendor
    Apache
    Product
    Guacamole

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-190 Integer Overflow or Wraparound

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    Related CVEs

    CVE-2024-35164 (CVSS 6.8) — The terminal emulator of Apache Guacamole 1.5.5 and older does not properly validate console codes received fr…
    CVE-2023-30576 (CVSS 6.8) — Apache Guacamole 0.9.10 through 1.5.1 may continue to reference a freed RDP audio input buffer. Depending on t…
    CVE-2023-30575 (CVSS 6.5) — Apache Guacamole 1.5.1 and older may incorrectly calculate the lengths of instruction elements sent during the…
    CVE-2021-43999 (CVSS 8.8) — Apache Guacamole 1.2.0 and 1.3.0 do not properly validate responses received from a SAML identity provider. If…
    CVE-2021-41767 (CVSS 6.5) — Apache Guacamole 1.3.0 and older may incorrectly include a private tunnel identifier in the non-private detail…
    CVE-2020-11997 (CVSS 4.3) — Apache Guacamole 1.2.0 and earlier do not consistently restrict access to connection history based on user vis…
    CVE-2020-9498 (CVSS 6.7) — Apache Guacamole 1.1.0 and older may mishandle pointers involved inprocessing data received via RDP static vir…
    CVE-2020-9497 (CVSS 4.4) — Apache Guacamole 1.1.0 and older do not properly validate datareceived from RDP servers via static virtual cha…
    CVE-2019-19603 (CVSS 7.5) — SQLite 3.30.1 mishandles certain SELECT statements with a nonexistent VIEW, leading to an application crash.…
    CVE-2018-1340 (CVSS 7.5) — Prior to 1.0.0, Apache Guacamole used a cookie for client-side storage of the user's session token. This cooki…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High